I really loved the scene when both Clark and Oliver got called/beeped at the same time. It's like they already connect before they even know about each others true identity.
I don't think Clark can learn much from GA in terms of moral values. I mean, Clark himself says that stealing from the rich is not the way to help the poor. Even if Lionel got the bracelet from the black market that doesn't mean he didn't pay for it.
But he can learn from GA in that he has to be a superhero for more peoples than only his friends!